The same shade had before been observed at the bottom of an isolated enclosure, known by the name of Lichtenburg's circle, which is situated near the Hercynian mountains, on the borders of the moon; but they could not tell the nature of it.

Dr Yves Godderis said that the formation of these mountains meant that the rock weathering, which was threatening to slow to a walk through much of the supercontinent, was able to continue and the steep slopes of these Hercynian Mountains produced physical erosion occurring in a humid equatorial environment, this physical erosion promoted rock weathering and removing CO2 from the atmosphere.

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